resort to

to do something that you do not want to do because you cannot find any other way of achieving something:
I had to resort to violence/threats to get my money.
[ + -ing verb ] When she didn't answer the phone, I resorted to calling up to her from the street.
(Cambridge Advanced Learner's Dictionary & Thesaurus からの resort to sth の定義 © Cambridge University Press)

ビジネス英語
to do something that you do not want to do because you cannot find any other way of achieving something:
The company could decide to resort to litigation.
(Cambridge ビジネス英語辞典 からの resort to sth の定義 © Cambridge University Press)

- Cambridge Dictionary